It's the last week of the heats and the final group of amateurs battle for a place in the quarter final. Firstly they are asked to cook their Calling Card, a dish that represents who they are as a cook. John and Gregg each pick their favourite dish and two lucky cooks will go through to the second test. The remaining three contestants must decide whether to create a savoury dish using lamb rump as the main ingredient or a sweet dish using mango as the central ingredient. They have one hour to create a dish that will earn them a place in the next round. One chef will be sent home. The four remaining cooks now have to cook two courses that will excite not just John and Gregg, but also some of MasterChef's most inspiring winners and finalists, who return to judge the food of this year's new contenders. John and Gregg will then decide which three contestants deserve to go through to Friday's quarter final.